Centrifugal pole-making apparatus



may 27, 1924. 1,495,73?

D. B. HANNA CENTRIFUGAL POLE MAKING APPARATUS Filed Auz. 15- 1921 7 Sheets-Sheet l May 2? mm 1,435,?7

D. B. HANNA CENTRIFUGAL POLE MAKING APPARATUS Filed Aug. 15. 1921 7 sheets sheet 2 May 27, 1924. 1,495,737

D. B. =HANNA CENTRIFUGAL POLE MAKING APPARATUS Filed Auz. 15 1921 7 Sheets-Sheet 5 Mi/immay 27, @924.

D. B. HANNA QENTRIFUGAL POLE MAKING APPARATUS Filed Aug. 15. 1921 7 Sheets-Sheet 4.

D. B. -HANNA CENTRIFUGAL POLE MAKING APPARATUS Filed Aug. 15. 1921 7 Sheets-Sheet 5 D. B. HANNA CENTRIFUGAL POLE MAKING APPARATUS 7 Sheets-Sheet 6 Filed Aug.

D. HANNA CENTRI'FUGAL POLE MAKING APPARATUS Filed Auz. 15. 1921 7 Sheets-Sheet 7 Patented May 2?, ltifi fwd-J3? DAVID B. HANNA, OF CHICAGO, ILLINOIS, ASSIGNOR T0 MASSEY CONCRETE PRO'D- UCTS CORPORATION, A CORPORATION 013 VIRGINIA.

CENTRIF'UGAL POLE-MAKING APPARATUS.

7 Application filed August 15, 1921.

To all whom it may concern:

Be it known that 1, DAVID B. T'TANNA, a citizen of the United States, residing at Chi cago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Centrifugal Pole-Making Apparatus, of which the following is a specification.

This invention relates to centrifugal machines for making hollow concrete poles and the like, and it has for one of its objects the provision of an improved drive for such machines.

Another object of the invention is to provide improved means of simple and effective character whereby the machine may be adjusted to secure proper distribution of the concrete.

Further objects are to provide an improved form of trunnions for revolubly supporting the shell on tube in the frame of the machine; to provide improved'rolling devices for conveying the mold into the tube; and to provide a simple and effective means for lubricating said devices.

My invention further contemplates the provision of a simplification and improvement of the mold whereby inter alia, the in-, tern'iedlate case heretofore used in apparatus of this character may be dispensed with.

In general my invention is designed to simplify the construction of parts, render them more accessible, and to extend the life of the apparatus.

The foregoing, together with such other objects as may hereinafter appear, or are incident to my invention, I obtain by means of a construction, the preferred embodiments of which are illustrated in the accompanying drawings, wherein Fig. 1 is a diagrammatic cross section on the line 11 of Fig. 2 illustrating the drive of a machine embodying my improvements; Fig. 2 is a plan View of Fig. 1 with a portion of the frame removed to expose the other parts; Fig. 3 is an enlarged side elevation and partial section of a portion of the machine illustrating the construction of certain of the details of my invention; Fig. 4 is a section on the line 44 of Fig. 3; Fig. 5 is an end elevation, partially in section of one form of trunnion rollers and associated parts employed in certain parts of the apparatus: Fig. 6 is a fragmentary plan of a sole plate used with the trunnions of Fig. 5; Fig. 7 is a Serial N0. 492,212.

side elevation, partly in section, of another trunnion; Fig. 8 is an end elevation of Fig. 7, partly in section on the line 8+8 of such latter figure; Fig. 9 is an enlarged sectional view of a detail of my improvements; Fig. 10 is a broken out plan view of several lengths of a sectional mold made in accordance with my invention; Fig. 11 is a longitudinal section through the mold; Fig. 12 is a cross section showing the mold in place and Figs. 13 and 14 are cross sections illustrating details of the mold construction.

Referring now to Figs. 1 and 2, it will be seen that the machine in general comprises a suitable base A; a frame indicated as a whole. by the reference letter B and consisting of a plurality of box frames 5, tied together and braced longitudinally by means of upper and lower channel members 7 and 8; the revolvable tube G into which the mold is. inserted: and the drive mechanism 1). The specific construction of the box frames forms no part of this invention and it will suffice to point out that they are composed of commercial sections suitably. secured together. The box frames are provided with a plurality of trunnion wheels to be hereinafter described which serve to revolubly support the tube C in the machine, the tube being provided with a plurality of tires 9 which ride on the wheels.

The driving mechanism D consists of a rope or cable drive which is 'enerally of a type heretofore employed in this art, but in this instance the main or drivin sheave 10 has its shaft directly connects with the driving motor 11, as a result of which I am enabled to dispense with the reduction gears heretofore employed and overcome certain disadvantages incident to their use. Tn this connection, it is to be borne in mind that tube C must be revolved at a very high rate of speed, the peripheral speed, in some instances, reaching a mile aminute in the larger sizes of the machine, from which it will be apparent that the problems encountered in connection with a gear drive are difficult.

Each box frame is provided with three trunnion wheels-an upper wheel e, and two spaced lower wheels f, the disposition of such wheels being clearly shown in Figs. 1 and t. The trunnion wheels are adjustably supported in a manner to be described for the purpose of raising and lowering the It ii tube C, i. e., for the purpose of inclining the axis of rotation slightly from the horizontal in order to cause the concrete to properly flow and distribute itself within the mold E which is adapted to he slid into and out of the tube 0, and to provide means for taking up wear in the revolving parts and provide means for quick access in replacing broken parts. The angle of inclination varies With the particular work in hand. The means whereby such adjustment is effected will now be described.

Referring to Figs. 4, and 6, it will be seen that the trunnion wheels f are mounted on trunnion shafts l2having ball bearings 13 at the ends, such bearings being carried in a housing comprising a base let and two standards 15 and 16, cast in a single piece. The standards 15 and have the usual. bearing caps and 16. and the ends of the trunnion shaft and the ball bearings are protected by a closure cap 17, to which lubricant is supplied in the manner illustrated in Fig. The pairs of trunnion wheel housings are slidably fitted into a sole plate 18, such sole plate being provided with flanges or ribs 19, on its upper face, providing channel-like pockets 20, in the bottom of which are seats Ll for the housings The sole plates l8'are supported in the b0): frames and extendv transversely of the machine. being secured to the lower members of the box frames by bolts The housings slidahly fit between the pads 23 at the sides of the pockets .30 and are thus rigidly supported against displacen'ient longitudinally of the machine. The length of the pockets transversely of the machine, however, is such that ample clearance is provided for shifting the housings inward or outward i. e. toward or away from the vertical center line of the tube C. and to permit of such adjustment 1 secure the housings to the sole plate by means of bolts 24. the heads of which are adapted to be fitted into lrey hole slots 25 formed in the sole plate.

ll; will be observed on inspection of 6 that the key hole slots extend transversely of the machine so that when the bolts 2+ are loosened. the housings may be shifted inward or outward as may be desired. m

to facilitate such adjustn'ient. T provide set screws or adjusting screws 26 and 2? (see Figs. 5 and 8) which are threaded in the flange or rib portions 19 forming the op posing ends of the pockets in the sole plate. With the bolts 52-!- loosened, it will be seen that by turning up one set of the adjusting screws and loosening the opposite set, the adjustment before mentioned can be readily obtained.

The trunnion wheels 0 are supported in a housing of substantially the same charas previously described. but such housiug are slidably titted for vertical more ment between the members constituting the top portion of a box frame, as will be clea seen on inspection of Figs. 3 and 4c. The housings for the wheels 6 are shifted or ad justed vertically by means of the pairs of set or adjusting screws 28 and 29.

The foregoing arrangement provides a very simple and elfective means for shift-- ing the axis of rotation of the tube C. If, for example, it is desired to lower the left hand end of the tube and raise the right hand end, all of the trunnion Wheels f on the left of the middle portion of the tube will be shifted outwardly from the vertical center line of the tube in graduated amounts, which will have the effect of lowering the left hand end of the tube, and the trunnion wheels 0 will be adjusted downward in graduated amounts to secure a firm support of the tube. On the right hand end the 3 trunnion wheels f will-he shifted inwardly in graduated amounts and the corresponding trunnion wheels (2 willbe accordingly adjusted vertically, thus raising that end of the tube. l am thus enabled to secure the desired adjustment without the employment of the more or less complicated wedge mechanism heretofore employed for such purposes, while at the same time the trunnion wheels are more effectively held rigid (which is of great importance in apparatus of this character) than has heretofore been the case. The construction of parts. is also such as to greatly reduce the possibility of any breakage and resultant injury to machine, and to provide means for taking care of decreased diameters of trunnions and tires due to wear.

It will be noted that the trunnion wheels f of the type shown in Fig. 5 are llangeless. This is chm'acteristic of most of the trunnion wheels with the exception preferably, of those located at the middle of the machine. These trunnion wheels are provided with flanges 30 as shown in Fig. T and also in Fig. l, which serve to support the machine against longitudinal displacement. The shafts 12 of such trunnion wheels. however, are longer than the shall tor the tlangcless trunnion wheels. and are provided with thrust bearings 31 in addition to the radial bearings 13. The housings for su h bearings and trunnion shafts are of substantially the same construction as that heretofore described, and this true also with respect to the sole plates employed. l prefer, however. to intrt'iduce a tiller plate between the housings and the sole plates. such tiller plate being indicated at 32 in Fig: and 3. These tiller plates are provided renewal purposes and to provide means both and lUU lit]

it)! l nt nt and the housings are shaped so as tit each other. as shown in Fig. when the housing adjusted h ougitudinal and transverse adjustm. iev

l ti l Ill) the screws 26 and 27 the filler plate will more therewith. Set screws are also provirlerl in the side pocket Walls for supporting the housing against. displacement longiturlinalh of the machine, and to provide 11 eans for longitudinal adjustment to take care of wear and irregularities in settin Referring now lo Figs. 4, 9 and 12, the manner in which the mold E is introcluceol into and supported within the tube will now he descrihmh At a plurality of points in its length the tube G is provirleil in its lower portion "with pairs of rollers 3 on which the niolrl is rolled into and out the "tuho. Located in substantially the same vertical plane and in the unper portion of the surh thing es a lso serving nor? the liiOltl (luring lho rollers fl lare hushed iinlicated at. and revolve on pins or shafts 38 mounted in a housing ll the holly portion of which zulaptml to he fitted into an re tulie Q. The pins 38 are hriranh such as "rease, is ini. rheeiu iron. the e: erior the C by means or the i i vines 40 the ll'ilfilworking inlo grooves ell lo the Worir A ihru r V is interpi'isrl 'l'hc roln'; bushing: andthe shoi tiered end of the pin 38. such lug the down thrust of the 1e mold, ihus securin easy runrollers 34; and extending the The hollow randy port on of the housing 39 is atlapled to receive Waste 43 or otho' suitahle nialieriah surh Waste performing the (louhle luau-lion oil luhricating' the rollers and. clianing' the surface thereof oi lrippings from the lllfiltl or other (lirt lhali may lorlg'e Wlllilli 'l'he tuhe.

lie' .raste may be inserted or removed from the exterior hy means of the cap ill. it a l he seen. therefore. tha for both 'u luhr ca'ti s5 and cleansing purposes the roller nierlianrm is accessible from lhe exterior,

which eliminates the newssity ol awliug inio ue tuhe.

rerringg now to l s. 10 lo lhr con- (1011 o? the mohl will he (lrsvrihetl. The is composed of a pluralily o serrions etc." lhe nuniher ilirreoi' depending he length of pole lo he uuulo. l larh s roinp-i'iui eil oi suhsl'anliallj; CUUIllT-Y- upon seetion part halves, each half being cast in a single piece. Eachhalf section comprises a semitube tapering toward one end. Extending longitudinally of the section, at the edges of the tubular portion 4-5 are holting up flanges 46, such flanges also serving for stiffening purposes. Each half-also has two radially dispose-Ll, longitudinally extending ribs 47, preferably disposed at an angle of 90 with respect to each other, each of said rihs terminating in a foot portion 4-,8-also exiencling longitudinally of the mold ancl having its ouler face concentric Willi the tube portion 45. [it intervals throughout the engih of the hall mold there are transverse strengthening ribs 49 as illustrated in Fig. 13, and at the ends of earn hall? section there are Wehs 50 by means of nliirh aeljacent sections are holleil ggether as at 51 in 10. There is a similar weh portion 50 in the middle of eaeh section. The holting up flanges are grooretl as indicator. in Figs. 12 to so that when a pair of hali seolions are brought together a mortise shaped groove 5:? 1 formed such groove extending; longitudinally of molrl section and provid ing a spare atlapiecl to receive a tongue for I I I 5", .0 .r fin rorrning the noise for me 21o eps ilus provides a ('OIETPRHQ'IH? anti means nlierehr the tongues may he i "led to secure the desired spacing: While at the same lirne they are securely held in plare when she halves are holtrd up.

ll will he seen that when two or the hall inolrls are brought together, a cross shaped inolrl results the footer legs of vhich serve as a means for supporting: the mold luring insertion and removal and also luringhe revolving of the parts. The mnslifi'ietion is strong and rigith and sinre the outer faces (iii the feet 48 are everywhere uniformly clisnt from the center of the mold. that is to q oil uniform cliametrix they lit the tube and 1 sin enabled to eliminate the use of the iulerin clia'l' s'eel case heretoil'ore used be tween the tube and the niolcl proper, and ean directly insert the mold into the tube. ll will also he apparent as previously inli calecl, that no (liiilculties will he encountered in conneeljion with the support of the molcl in (he iulio by rirl'ue oi the conlig ux'ation of the mold feet and the rollers 34" this being: such as lo prevent any accidental displacement or (lislorlgenient of the mohl. It will thus he noted that I hare reduced the Weight i of lhe rerolring parts to a minimum.

.The foregoing together with such other ohjevts as ma he inoiclent to my invention will he readily understood h {hose slzillerl revol ii a ul therein, home of a . member,

ion

ill)

therefor carried on said member and extending exteriorly thereof, said housing having a cavity adapted to retain waste or the like.

2. ln centrifugal pole making apparatus, the combination of a revolving member adapted to receive a mold therein. a roller on the interior oi said member, a housing theret'or carried on said member and extend ing exteriorly thereof, said housing having acavity adapted to retain waste or the like, and a cap closing said cavity.

3. In centrifugal pole making apparatus, the combination of a revolving tube adapted to receiie a mold. a roller, a housing therefor adapted to retain waste or the like; and a closure for said housing accessible from the exterior.

4-. 1n centrifugal pole making apparatus, a mold comprising a tapered tubular porlion and a plurality of radial positioning ribs the outer edges of which throughout the length of the mold are substantially unit'ormly distant from the center of the tube.

,ln centrifugal pole making apparatus, a mold comprising a tapered tubular portion and a plurality of radial positioning ribs extending longitudinally thereof the outer edges of which throughout the length of the mold are substantially uniformly distaut from the center of the tube, and transverse or circumferential ribs merging with the radial ribs.

(3. lln centrifugal pole making apparatus, a mold con'iprising a tapered tubular portion and radial positioning ribs extending longitudinally thereof the outer ends of which terminate in feet. substantially uniformly distant from the center of the tube.

7. ln centrifugal pole making apparatus, a mold comprising a tapered tubular portion and radial positioning ribs, extending longitudinally thereof, the outer ends of which terminate in feet substantially uniformly distant from the center of the tube and the outer faces of which are struck from the center of the tube.

8. ltn centrifugal pole making apparatus. the combination of a revolvable member adapted to receive a mold, and a pair of rollers in said member in the lower portion thereot arranged to the side of the vertical center line thereof, said rollers being flanged and said mold having means fitting between the roller flanges.

ln testimony whereof, l have hereunto signed my name.

Dea t ll) B. HANNA. 

